wantz



y Y J. B. WANTZ 2,001,004

X-RAY TUBE HOLDER Filed Aug. 30, 1950 4 Sheets-Sheet l 5o 50 ra M 48 INVEN TOR May 14, 1935. l 5, mm zmmm X-RAY TUBE HOLDER Filed Aug. 30. 19504 Sheets-Sheet 2 May 14, 1935. J. B. WANTZ X-RAY TUBE HOLDER Filed Aug,30, 1930 4 Sheets-Sheet 3 .4 TTO EY May 14, m. J. B. WANTZ 2,m1,004

X-RAY TUBE HOLDER Filed Aug. 30, 1930 4 sheets sheet 4 FIG] FIE- .4-E50: 58

A r/M7 Hai I E;

57 QZY IN VEN TOR ATTO EY Patented May 14, 1935 PATENT OFFICE i2,001,004 X-RAY TUBE HOLDER Julius B. 'Wan'tz, Oak Park, Ill., assignorto General Electric X-Rayflorporation, Chicago, Ill., a-corporation ofNew York Application August 30, 1930, Serial No. 478;:044 8 Claims.(cram-s4) The present invention relates to- Xray at paratus andhasparticularly to do with a supportingstandrfor an X-ray'tube and themechanism associated therewith.

Rapid strides are being made in the X-ray art. Unification of theapparatus connected therewith is being bad. Marked improvement in X-rayapparatusstructure giving greaterflexibility to such apparatus andproducing finer results is being obtained.

With the. introduction of oil immersion for X- ray tubes andtransformers-a tubebeing contained in a head? the whole technique of theX-ray. art has been modified and has been changed to such an extent'thatnew, improved and different apparatus for holding such oil immersedtubes and their heads has been devised as .a matterlof necessity. Whilesome of the structures now being produced may appearto be quite similarin principle to previously employed apparatus where an X-ray tube wasused with its exposed high tension wires, there is a fundamentaldifference which may not beinstantly perceived or discovered upon acasual 0 examination of a drawing accompanying an application for patentfor these improved devices. An X-raytube with its exposed wires and itsshield was relatively lightin weight. It was a cumbersome device,however, and there were many limitations to its operation. 'The everpresence of high tension wires in juxtaposition to the patient and theoperator, aswell as the in-- adequate protection which the conventionalshield afforded from X-light made the Whole apparatus a dangerousmechanism although its utility was omnipresent. 1

With the introduction of heads containing the high tension transformerand X-ray tube, and with the use of oil immersion for cooling andinsulating theX-ray apparatus mounted in such a hBZvifiJl' entirely newfield of X-ray'development opened. The heads which are employed forcontaining X-ray tubes and transformers are quitelarge and extremelyheavy. The supports for such heads and the apparatus needed forrendering the operation of such heads flexible are wholly different fromthe supports which could be and were employed in association with therelatively light tube and. lead glass bowl shield thereabout. Thechanges in the suspension of. the X-ray tube have'led to many changes inthe ancillary apparatus. v

, One of the objects of the present invention is 0 to provide a suitablemechanism for association combination of elements shown in the singleemwith an X-ray head and which will provide an improved support for saidhead.

MAnother object of the invention is the provision of a support for anX-ray head whichsupport cooperatively and independently maintainsinstrumentalities for use in association with such head. 0

Another object of the present invention is an improvement of the presenttype of support to lend greater strength and increased flexibility Ythereto.

A .furthe'r'object of the invention is the provision of improvedmanipulatory means for an X-ray head, as well as improved structure forthe instrumentalities used in association therewith and for the supportthereof.

Other objects of the invention include the improvement of the details ofstructure of mechanisms associated with X-ray tube head supports, andthe accessories supplied for use with anX-ray tube.

These objects and such other objects as may hereinafter appear, areobtained by.the novel structure, unique arrangement, and improvedbodiment of the invention illustrated in the accom'panying four sheetsof drawings, hereby made a part of this specification, and in which:

Figure 1 is aside elevation of one form of an X-ravapparatus embodyingthe invention, a part ofthe standards being broken away for compactnessof illustration;

Figure 2is a front elevation of the device H shown in Figural;

Figure 3 is a plan view of the device shown in Figures 1 and 2 Figure 4is a transverse section of the base on the line '4-4 of Figure 2;

Figure 5 is a longitudinal or vertical section through said base;

Figure 6 is a vertical section through brake and release handles used inconnection with the standards and base;

Figure 7 is a section through the locking mechanism for holding the headin angular relation to its carriage upon the standards;

Figure 8 is a fragmentary detail in plan view of the carriage lock; 0 0

Figure 9 is a transverse section through a portion of said lock;

Figure 10 .is a fragmentary detail, partly in plan, of the means forlocking said carriage in vertical position on said standards- Figure 12is a front elevation of the locking device illustrated in Figure 10.

Like reference characters are used to designate similar parts in thedrawings and in the description which follows.

What is hereinabove and hereinafter referred to as a head comprises atank I5 and a cover l6 within which an X-ray tube and its high tensionand filament transformer are disposed. Upon the tank l5 may be mounted ashutter mechanism (not shown) of conventional structure and through suchcover I6 is a window ll, not clearly shown, but of material transparentto X-light as is conventionaL- Such a head E5 in the present apparatus,in-.

cludes an X-ray tube, not shown, a high tension transformer for suchtube, and a transformer for filament current for said tube. The tubeencased in such head generally comprises the well-known hot cathode(Coolidge) type of tube. Suitable conduits and connections are arrangedintermediate .the several named parts, the control of the tube beingfrom the outside of the tube head. 7 I

There are no high'tension conduits external to the tank portion of saidhead. By insulatory measures. and grounding the head is maintained atground potential and is wholly free fromthe danger of shocking a patientor attendant.

At each side of the tank l5 which is ribbed at it to provide for rapidradiation of the transformer and tube heat, are two bosses 28 and'2l.The bosses 26 and 2| provide journals or axle like supports whereby theentire head is supported upon a bifurcated member 22 having a shank23extending into a frame support, best shown in Figure 3.

The arms of said bifurcated member 22 may be intermediate the stoutshank 23 which is centrally disposed of the arms 24 and 25 of saidbifurcated member 22, said shank 23 providing a shaft disposedhorizontally in a cross member or yoke 28 which forms the front part orthe .front transverse member of a rectangular carriage (see Figure 3).Said shank 23 is adapted to be rotated in a boss 21' in said transversemember 26, there being in said boss two bushings 28 providing journalsfor the rotation of said shank 23. On said shank 23 adjacent saidbushings are collars 29 and 36 .to prevent axial displacement" of saidshank.

Intermediate said bushings 28 which are secured in position by screws,as shown, or in some other suitable manner, and about the shank 23 is afriction ring 3|. This has an aperture 358, truly round with clearance,.therethrough, and in which shank 23 may freely rotate when no forceisapplied to the ring to 1 cause a portion of its suriace to engage saidshank 23. 1

At one side, said ring 3! has a boss 33 and a sleeve 34. Securedtherein, for rotation, is a threaded shank 35 which is mounted forrotation without axial movement in the top section of transverse member26. The threads on said shank 35 extend into said sleeve 34 which has acomplementally threaded portion to cause said ring 35 to be drawnupwardly when shank 35 is rotated in one direction by handle 36 securedthereto and forced downwardly when said handle is moved oppositely. Theunder portion of the secured end ofhandle 36 is adapted to ride on ahorizontal section (boss 21) 75 of the transverse member 26.

When drawn upwardly ring 3i engages at the under surface of aperture 32the under surface of shank 23 whereby to prevent relative movement ofsaid shank 23 to said transverse member 26. When lowered, ring member 3!disengages itself from close contact with member 23 so that the shank 23and the head supported by bifurcated, member 22 may be rotated on ahorizontal axis and relatively to transverse member 26.

The remainder of the rectangular carriage of which member 26 is thefront member includes a transverse back piece 31 and two tubular or sidemembers 38 and 39 which extend from enlarged portions or bosses upon thefront transverse member 26 to the rear transverse member 31 in both ofwhich the rods are firmly anchored. At one side of member 31 is anextension 4ll, and on the same side of transverse member 26 is a rodsupport 4|. The ends of said tubular members or bars 38 and 39 aresecurely fastened in said front transverse member 26 after extendingthrough the bosses at the sides of said front member. A counterweight 42may be secured to member 31.

For maintaining said head and the supporting members therefor at adesired and selected elevation above a patient, or a table upon which apatient is disposed, or in proper relation to a vertical panel used inassociation with a patient, there is provided a movable stand whichsupports the rectangular frame.

For flexibility just described, such movable stand is disposed upon atrack or fixed base on which it may ride.

The fixed base for the device comprises end members 43 and 44,transverse members 45, two parallel rails 46, and an ancillary rail 41.The transverse members 43 and 44 have at each end a flat shoe 48 whichis threaded into lugs 49 at the outside thereof. The lugs 49 arethreaded vertically and the shanks 50 on the adjusting members extendtherethrough.

Rotation of a shank 50 changes the relative position of the adjustingmember to the lug 49 whereby to take care of an unevenness in the flooror other supporting plane. Such an adjusting member is at each side ofthe end members 43 and 44.

Each of the end members 43 and 44 has a lug portion 51 to surround thestandard supporting rails 46 and the supporting rails 46 are securedtherein by any suitable means.

The transverse intermediate members 45 comprise lug portions 58 the topside of which engages a fraction of the under surface of the rails 46.From each of the transverse members, there is a lateral lug extensioncarrying an adjusting member similar to that on the end members. Inassembly, opposite end members are reversed in position. The ancillaryrail 41 is of smaller diameter than the supporting rails 46 and issecured at its under surface by screw or other means to the end members43 and 44 and the transverse members 45 whereby it is maintainedconstantly in parallelism with the parallel supporting rails 46.

The movable standard support comprises an H shaped casting 59, havingfour legs 60, 6!, 62 and 63. One of the legs, 63, is somewhat wider thanthe other three, 60, 6! and 62. All four of the legs are shaped likeinverted Us in cross section, thus forming two sides provid ing journalsfor axles 66 upon which roller bearings 61 rotate.

" which carry a two part clamp II and a short to casting "'I2.

ter casting 59.

moor-p04 Securedto the H shaped casting 59 or -integral therewith is acast portion comprising a spider or web having arms I9 which terminatebeneathand are secured to the dished cen- Above the casting 59 is around casting 12 having reinforcing members on its under side rod orshaft I5, both centered with relation Shaft "I passes through asuitableaperture in casting 59 and the spider having the arms I9. Acollar I9 is secured at the end of shaft 'I5"'belowcasting 59 and thespider to maintain the upper casting I2 against raisingor tilting inrespect to casting59 and to prevent accidental separationof said parts59 [89 is adapted to be disposed, said smaller standard 99 beingparallel with said lar'ger' standard I8. The two standards 18 and 89combined provide the support for the mobile portions of the Iapparatus,-later to be described.

Upon the larger leg63 of casting 59, there is disposed ahousing BI whichextends vertically upward. Said housing is suitably secured to theto-pof leg 93. In 'saidhousing 3| there are mounted for rotation therein,one shaft being terminate in handles 94 and 85.

within the other, two shafts 82 and 83 which The smaller I internal andlonger shaft 82 is mounted in a threaded seat 96. I h

Suspended to the standards support for move-- ment therewith is abrakeshoe 81. This comprises an elongated member having two lugs 88 and 99extending about but not around the I smaller rail 41. The brake shoe 81is so mounted that downward rotation of shaft 82-causesthe end thereofto impinge upon a button lug 99 at the top of said shoe whereby to forcesaid shoe 9'! into right frictional engagement with the smaller railthereby causing said shoe 8'! to become immovable along said rail 41 andconcurrently rendering the standardsupport immovable along itssupporting rails 46.

The outer shorter and hollow shaft 83 which rotates about the longershaft 82 and is operated by the lower handle 85, extends downwardly tothe top of the lower cas'ting59. There it is supplied with the collar 9|to prevent too great downward movement. To a pin 92 at the side thereofis a link or lever 93. Said hollow shaft 93 is slidable longitudinallyon shaft 82 and when it is lifted it concurrently lifts the pin 92 and iat the same time elevates one end of the link 93 just referred 'to.

Said link 93 is pivoted to a stud 94 insaid porting member 98 having aslot 99 to receive,

lever 93. Said supporting member is suitably secured to casting 59, thetransverse member including a hub I 99.

The under side of the link 93 engages thehub I99 andthe plunger 95extends through the link 93 up into such hub I99 where it is surroundedby a spring which extends from the top side of the link 93 to the headPM of the plunger '95.

There are two pockets HJIiand I93 into which the plunger head I91 isadapted to be seated in the upper casting I2. One of these is in theposition shown in Figure 1 and the other is at a ninety degree angletherefrom, the movement being clockwise from the position shown inFigure 1. To limit the upper movement of the shaft 93, the pin 92 isadapted to engage a collar I94 secured in housing 81 and surroundingshaft The reason for the two positions of the standardsis that in oneposition the head may be used over a table while in the other th'eheadmay be pushed to one side to allow free access to the table top to allowready manipulation of the patient.

Stops are arranged to prevent the movement of the upper casting morethan ninety degrees. Thus, if it is desired to move the standards I8 and99, or their appendages, from one position to the other, the upperhandle is lifted whereby the spring catch holding said castings 59 and'12 in one position is released by moving it out of seat I99. Thestandards are conjointly moved ninety degrees with theupper casting I2when the spring catch 95, if released, will automatically engage pocketI93 provided therefor and lock the upper casting T2 in its second secureposition. To get said casting I2 back to the original position, the samemeans of release are employed and the standards are swung manually withthe casting I2 to the original position.

As a matter of convenience, the housing 8| for said handles and shafts82 and 83 may be arranged for ready attachment and detachment from thecasting 59 by being provided with lugs on opposite sidesthereof, one ofsaid lugs 199 being short and being shown at the left in Figure 4. andthe other I I9 being longer and extending along the top surface of saidsupport to provide adequate support for the housing 8| against angularstrains when moving the carriage therewith. Suitable screws or bolts maybe employed for holding said housing 81 upon said casting 59.

Said two standards I8 and 89 are locked together at their tops by a yokeIII, the ends of which have brackets I I2 and I I3 to support twopulleysH4 and H5. Suitable pulleys are selected so that the internal portionthereof falls in alignment with the axis of said standards, so that aweight, not shown, may be arranged to ride up and down it within each ofsaid standards and be secured to cables H6 and I II passing around saidpulleys H4 and H5, the position of said pulleys H4 and I I5 being suchthat no friction is produced by causing the weights or either of them todrag upon any particular portion of the surface of the internalperiphery of said tubular standards "I8 and 89.

Surrounding said larger standard is a sleeve I l 8. Said sleevecomprises at its bottom two forwardly projecting brackets H9 whichprovide journals for roller bearings I29 adapted to en gage .at spacedintervals the front portion of said standard I8. Opposite said bracketsH9, the material of said sleeve extends about the standard I8 but doesnot engages this post, thereby avoiding friction.

At the top end said sleeve 8, there a forwardly projecting lug I2I whichprovides an anchor for the cable H3 adapted to be attached thereto,surround the pulley I I4, and extend into the larger standard 18 whereit is secured to a weight, not shown. The weight not shown provides acounterpoise for the head and the supporting members therefor.

At the back of said upper section of the sleeve IE8 are two brackets I22oppositely disposed with respect to the brackets I I9 referred tohereinbefore, these brackets I22 supporting roller bearings I23 whichare adapted to engage the rear section of the standard 18. The frontbearings I29 are adapted to engage the standard 18 at the front andapproximately forty five degrees from the middle front line at each sidethereof, while the bearings I23 at the back are at forty five degreesfrom the middle line of the rear and at each side thereof, thus thesleeve I I8 is supported by roller bearings engaging said uprightstandard ninety degrees apart. The bearings I29 at the front are belowthe point of the suspension of weight on said sleeve and those at theback being above the point of such suspension so as to distribute theweight suspended therefrom without unduly centered strain upon thesleeve IE3 or the standard 18.

Projecting rearwardly from said sleeve H8 is a bifurcatedsection I24which is adapted to engage each side of said smaller standard 80 toprevent rotary displacement of said sleeve I I8 on standard '58 andwhich is adapted with other parts to maintain the head in selectedposition relative to said main standard 18.

Projecting rearwardly from said bifurcated portion I24 are two arms H5and I26, the ends of which are provided with roller bearings I21 andI28. Beneath the central portion of said sleeve IIB are additionalbrackets I29 and I30 which project forwardly to provide journals foradditional roller bearings I3I and I32.

The side members 38 and 39 of said head supporting carriage are adaptedto ride upon said several rollers, the top surface beneath the rearrollers I21 and I28, and the bottom surface on top of the bearings I3Iand I32, whereby said rectangular frame members 26, 31, 38 and 39 areheld horizontally, but are readily movable transversely of said sleeve.The spacing apart of the supporting rollers I21, I28, I3I and I32 issufiicient to provide for a ready and free movement of said carriagewithout undue binding on the frame at either the front or back inrelation to said rollers.

Above said sleeve II 8 on said main standard is a second sleeve E93which has a plurality of brackets H4 and I95 for roller bearings I36 andi231 which roller bearings are adapted to en gage said main standard 18at its front. At the back of said sleeve E33, is another bracket I38 inwhich is a bearing i 99. The several bearings 95, 31 and I39 permit ofthe free movement of said sleeve E33 along said standard 18.

Rearwardly extending from said sleeve I33 is a lug I lfi which projectsto the rear of a device to form an anchor for pulley cable II1 whichpulley cord H1 is adapted to be threaded over the pulley H5 and dependinto the smaller standard 39, there to have hooked or attached thereto aweight forming a counterpoise for the part of the apparatus now to bedescribed and which is supported wholly upon the upper sleeve.

Said lower and upper sleeves, II8 and I33, are adapted to be attachedone to another by a hook I4I on the lower sleeve II 8 passing overa studI42 on the" uppersleeve I33. Thus, when the two sleeves H8 and I33 arefastened together, they will move in unison. When the hook I 4| isunhooked or released from stud I42, each one of sleeves H8 and I 33 maybe moved independently of the other. For purposes of convenience thereis provided upon the smaller standard 80 a locking ring M3 by virtue ofwhich the upper sleeve I33 may be locked in its uppermost position toprevent any tendency on its part to become misadjusted relatively tosleeve II8 when the two are detached.

At the front of said upper sleeve I33 are two projections I44 and I45intermediate which, is a suitable bolt I46, the ends of which extendthrough said projections to be secured against displacement.

Between said projections is an arm I41 having apertured lugs I48 and I49through which bolt I46 projects, thus providing pivotal mounting forsaid arm I41 which extends outwardly from the device. Pivotally mountedto arm I41 by a vertically disposed bolt I50 is a second arm I5I and bya similar bolt I52 there is attached to the second arm a section I 53forming one half of an adjustable connecting member. The other half I54of said adjustable member terminates in a highly adjustable support fora fluoroscopic screen, comprising a bifurcated support I55, betweenwhich at points I56 is a fluoroscopic: screen I51 having handles I58.Said support is a bifurcated bracket which extends to the side of saidscreen I51, the screen being freely adjustable and moving almost at thewill of the attendant. The handles I58 are provided upon said screen I51so that it may be readily moved about the pivots I in said bifurcatedportion I55 and may be further adjusted by said handles by the forceapplied thereto, causing said pivoted arms I41 and I5I to angularlyadjust themselves to any selected position desired by the operative orattendant.

For locking said main sleeve I I8 in vertical adjustment upon saidstandard 18, there is provided at the side thereof a locking levermember which, by rotation, is adapted to release spring pressure uponthe sleeve member Il8, whereby a pair of blocks loosely secured one toanother are adapted to be forced against or released from said standardIIB thereby securing said carriage in any adjusted position upon saidstandard 18, or releasing said sleeve from such position.

The sleeve I I3, at its side, has a locking device that is illustratedin detail in Figures 10 and 12. A shoe I59 engages the standard 18. Afollower block I80 riding in a slot in sleeve H8 supports shoe I59 andhas a shank IE1 surrounded by a spiral spring I53. Shank I61 can notrevolve. The spring I63, shank I61, block I69 and shoe I59 comprise aplunger I62.

A housing 55 i attached to sleeve I I8 by screws 2I4 encloses the shankI 61. The outer face of housing I64 comprises an angularly cut cammingsurface. The inner part of the housing outwardly of the camming surfaceforms an apertured hub over which is an apertured cap I65, which has acamming surface 2M slidably engaging the camming surface on housing I64.

One end of the spring 463 presses against the inner part of the closedend of housing I64. Shank it"! passes through an aperture or opening inthe housing and through the opening in cap I55 which registers with theopening in the housing I64. A ring washer 295 is disposed between thehousing I64 and cap I65. A cap 2 1 screwa2I2, the cap I65 beingrelatively movable moving sleeve.

aromas v stops .2I3 may be providedbetween the a mir szsur aee f, de

pgZH ispressed againsthousing I65 by to the cap ZI I. The spring I63serves to force the shoe I59, and. attachedmembers inwardly.

As lever I66 on .capflfib is moved, the camming surfaces cooperate toforce. the cap I65 outward- 1y, compressing the spring I61, and movingthe entire plunger I62 outwardly, freeing the'shoe I 59. from stand 18to allow the sleeve H8 to be moved relatively thereto.

that the transverse. sliding ltwill be noted frame is provided with acushioned member 206 disposed upon transverse member 26 whereby it isimpossible to move said frame beyond a predetermined distanceiharearward direction.

Also on the bifurcated member I24 is asimilar bumper I69 which. isadapted toretard too great forward movement by engagement withtransverse member 31. I

For the purpose of taking stereoscopic views,

there is provided. upon the side of said horizontalfcarriage aspreviously described a pair of brackets ,which support a rod which isadapted to be rotated therein in the manner hereinafter described. Byrotation it may be caused to actuate a locking mechanism. Along said rodis a sleeve. This sleeve is adapted to be secured in a selected positionby a thumb nut which is threaded in the top surface thereof and which isadapted to be threaded into engagement with said rod. By adjustments,the carriage may be moved predetermined distances.

At the left hand side of the device through an ear AI at the front andan ear 4!] at the rear is a rod I10 having a handle "I at the front sothat it may be moved through an angle.

Said rod I10 is slotted longitudinally at I12 to facilitate its beinglocked in a selected position.

Intermediate the length of the horizontal frame is a yoke I13 whichsurrounds the left hand frame rod 38 but through which yoke I13 said rodI10 slides. Said yoke I13 also surrounds said rod I10 disposed in thetwo eyes 40 and II and there is intermediate the yoke I13 and thevertical movable sleeve I I8 a flexible but secure connection I14 tomaintain the yoke I13 in alignment with the sleeve II8.

On the under part of the yoke I13 is a shoe I15 which is'adapted to bemoved against the rod 38 as an incident to the movement of the handle orlever I1I hereafter called the locking lever. Movement of the handle I1Ibrings shoe I15 against rod 38 as is shown in Figure 9. When sodisposed, the horizontal carriage cannot move, but when the handle I1Iis rotated to another position, the carriage is released for movement inand out.

By turning the rod handle I'II in a clockwise direction the cam or shoeI15 is forced against the larger rod 38 gripping the larger rod38 toprevent movement of the horizontal frame frontwardly and backwardlybecause, of said yoke I13 so secured to the saidvertically On the top ofthe yoke I13 is a stud I11. On the small rod H and adjustable therealongis a shoe I18 carrying therethrough a thumb screw I19 whereby it maybemade to take any selected position along said rod I10. Said shoe I18has a lateral projection I80 one side of which terminates in a pointeror arrow I8I in order to indieate. a central position. Said extension I80; is slott ed at I82 substantially its entire length and the stud I11upon the yoke I13 projects therethrough, said stud I11 terminating in anenlarged head I83, as for example, a screw head, to prevent displacementof distance admitted by the remaining portion of the slot, and whentheend of the slot is attained the second radiograph is taken. i

When it is desired to prevent; any movement whatever of the horizontalframe, then the other locking member is employed after the properposition for the head has. been determined.

The'tube head tank I5 has at its side a means for sustaining it in aselected angular position. TA semi-circular member 220 is attached to"the arm 24 A second; semi circular member MI is mounted-on; arm 241opposed to member 2f2l and the two are combined tofo rm a slit ringfitting closely about circular boss 29. One end of member 22!]terminates in a split lug 222 between the legs of which a tongue 223 onmember 22I extends. A lever 203 is pivoted between the legs of the splitlug 222, and has at its inner end anv eccentric 224. As lever 293 ismoved, the eccentric 224 contacts the tongue 223 to press the twomembers 22!! and HI together to grip the boss 2|, and as the movement isreversed, the lever 2B3 disengages the lug 223 to loosen the grip ofmembers 225 and 22I to free the boss, permitting the tank I5 to be swungfreely upon its pivotal supports. A screw as shown may firmly connectmembers 220 and HI at one side and another screw loosely connects suchmembers at their other side.

I claim:

1. X-ray apparatus comprising a base, tracks for said base and alongwhich it is movable, means for locking said base on said tracks, aturntable on said base, standards on said turntable, and X-ray apparatusof different kinds secured to one of said standards.

2. Means for determining the horizontal limits of movement of an X-raytube for stereoscopy, comprising a horizontal frame, a head dependingfrom and beyond said frame, standards within said frame, a collarcommonly engaging said standards to prevent rotation, movable verticallythereof, and having arms to support said frame, a yoke connected tosaid. collar, a rod rotatably supported by said frame and movablelongitudinally through said yoke, a stop member adjustable on said rodto determine the limit of movement of said rod through said'yoke, andmeans held against axial displacement by said yoke and rotatable withsaid rod for engaging said frame thereby rendering said frame immovablewith respect to said yoke.

3. In X-ray apparatus, a track, a base movable along said track, aplatform rotatable on said base about a vertical axis, standards mountedon said platform, an X-ray tube head support upon one of said standardsand maintained by another of said standards in constant alinement withthe axes of said several standards, and an X-ray tube head on said X-raytube head support.

4. X-ray tube supporting apparatus comprising a track, a base movablealong said track, a turntable on said base and rotatable thereon about avertical axis, a plurality of standards on said turntable, an X-ray tubehead support on one of said standards, an X-ray tube head on saidsupport, and means cooperating with said turntable for locking saidturntable in predetermined selected positions on said base.

5. X-ray tube supporting apparatus comprising a track, a base movablealong said track, a turntable on said base and rotatable thereon about avertical axis, a plurality of standards on said turntable, an X-ray tubehead support on one of said standards, an X-ray tube head on saidsupport, latch means for engaging a plurality of seats on said turntablefor locking said turntable in predetermined selected positions, and arelease means for freeing said latch from any of said several seats.

6. Means for mounting an X-ray head comprising a turntable andsupporting means therefor, upright-standards on said turntable, one ofsaid standards having an axis coinciding with the axis of saidturntable, the other standard being separated from said first standard,a collar on one of said standards and guided by the other of saidstandards, arms each provided with a bearing and depending from saidcollar, a frame upon said bearings, and an X-ray tube head containing anX-ray tube depending from said frame.

'7. Means for mounting an X-ray tube head for vertical and horizontalmovement comprising a base, a turntable on said base, spaced apartupright standards mounted on said turntable, a collar about one of saidstandards and guided by the second of said standards, legs from saidcollar about the second standard and having bearings therebeneath,shorter legs extending from said collar in the opposite direction andhaving bearings thereabove, a frame on said bearings, and an X-ray headcontaining an X- ray tube rotatably mounted at one end of said frame.

8. Means for mounting an X-ray tube head comprising a track, a pluralityof standards, a platform therefor, a base movable along said track andon which said platform is rotatable, a tank for an X-ray tube and tubeenergizing instrumentalities and containing oil insulation therefor, atube and tube energizing instrumentalities in said tank, and means onone of said standards for supporting said tank.

JULIUS B. WANTZ.

